Machine for making leather-board.



PATENTBD MAY 12,1903;

5,1). ALVORD. MACHINE FOR MAKING LEATHER BOARD.

APPLlOATION FILED JUNE 26, 1901.

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No. 727,872. PATENTED MAY 12, 1903.

- B; D. ALVORD.

MACHINE FOR MAKING LEATHER BOARD.

APPLICATION FILED JUNE 25, 1901a H0 MODEL. 3 SHEETS-SHEET 2.

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E.D.ALVORD.

MACHINE FOR. MAKING LEATHER BOARD APPLIOA'I'IONFILED JUNE 25, 1901. N0MODEL. 3 SHEETS-SHEET 3.

Patented May 12, 1903. g

i ATENT 'rFroE.

EDWIN D. ALVORD, OF TALCOTTVILLE, CONNECTICUT, ASSIGNOR TO THE AMERICANFIBER LEATHER COMPANY, OF BRIDGEPORT, CONNECTICUT,

A CORPORATION OF NEW JERSEY.

MACHINE. FOR MAKING" LEATHER-BOARD.

SPEGIFIGATIONformin part of LettersgIPatent No. 727,872, dated-May 12,1903.

Applioationfiled June 25,1901.

To aZZ whom it may concern.- 7 Be it known that I, EDWIND.ALVORD, acitizen of the United States, residing at'Talcottville, in the countyofHartford and State of Connecticut, have invented'certainnew and usefulImprovements in Machines for Making zo companying drawings as embodyingthe invention has a horizontal shaftwith a frame supportingradially-movableperforated beds arranged to carry pulp-molds withforaminated bottoms and covers andby centrifugal action as the shaft isrotated move outwardly and force the molds against perforated heads thatform the periphery of the frame, so as to express and throwvoff allwater from the pulp that is containedin the molds.

tion of a centrifugal leather-board machine that embodies the invention.

5, mounted on the shaft, may be belted to any source of power, Fig. 2.Two collars, 6 5 are fastened on the shaft, and projecting radially withtheir inner ends threaded and tapped into the collars anditheir outerends passing through the ends of the metal plates 7 are rods 8. On therods between the plates Figure 1 of the views shows a front eleva-v Fig.2 shows a. side elevation of the samev machine. Fig. .3 shows a verticaltransverse sectional view, on-

Serial ra'eaet'z. oib mania and the collars are tubes 9, and on theouter 5o threaded ends of the rods are nuts 10, which 'Whenscrewed upclamp the ends of the plates between' the ends of the tubes and thebands 11, thatv encircle the fram Fig. 3.

The plates '7 are perforated, and fastened 5'; to their inner facesbetween the tubes are a number of perforated heads 12, preferably formed of wood with perforated metal linings 13. The perforations throughthe plates, the wooden heads,. and the linings coincide, but are shapedso as to increase in diameter toward the outside, Figs. 3,4.

Posts 14, with theirinner ends screwed into brackets 15, clamped totheframe-tubes, and their outer ends fastened; to the peripheral 6 plates,are provided for guiding the radiallymovable perforated beds 16. Each ofthese beds is composed of an outer perforated metal Ilic plate 17, aninner perforated metallic plate 18, and a perforated wooden body 19,with lugs 20, adapted to lit the four guiding-posts. The perforationsthrough these parts are tapered, the inner ends being the smaller, Figs.3,4. a

Two sleeves 21 are fastened to the back of each of these beds. The outerend of each sleeve is attached toa flange 22, that is held .alittle,distance'away from the back. of. the bed by studs 23, so as not toobstructanyof the perforations through the bed. A-rod 24 8o projectsloosely into each sleeve, and aspring .25is placed upon eachrod, soar;to thrust be tweena collar 26,'fasten ed tothe ro d'andthe end of thesleeve. Eachrod is threaded and carries a nut 27, which bears aworm-wheel 28. The inner ends of the nuts thrust against the ends ofsleeves 29, that are screwed into collars 30, fixed on the shaft, andthat receive the ends of the rods. A shaft 31, bearing two worms 32 andhaving a squared end for the reception of a crank 33, is supported bybrackets 34, attached to the outer ends of the sleeves 29 in eachsection, so that the worms will mesh with the worm-wheels, Fig.4.

By means of the worm and worm-wheels 5 the nuts are rotated so that theywill move the rods 24 and through the medium of the springs f rce thebeds outwardly or allow them to drop inwardly, according to thedirection of rotation of the crank.

A mold 35, containing pulp, is placed upon each of these beds. Each moldconsists of a hollow rectangular frame 36, preferably formed of wood,and a bottom formed of a perforated sheet-metal plate 37 with a bottomlining 38, composed of wire-netting covered with open-m esh cloth. Acover 39, composed of a perforated sheet metal plate and wirenettingcovered with open mesh cloth, is loosely placed in each mold on top ofthe pulp.

In the machine shown a moldis placed upon a bed as the machine is turnedand the bed comes above the floor, and then by means of the crank,worms, worm-wheels, and springs the bed is forced outwardly, so as tocompress the mold containing the pulp between the bed and the head. Eachbed when placed in position is forced outwardly and held with thesprings under considerable tension. After all the molds containing pulphave been placed in position on the beds and forced outwardly againstthe heads the machine is set in motion. Under centrifugal action due tothe rapid revolution of the molds and the heavy movable beds back of themolds these parts tend to move outwardly with great force, and thiscompresses the pulp and expresses the water and allows it to fly offthrough the perforations.

W'ith this machine leather fibers which are coarse and greasy can befirmly knit into a compact mass and the water of the pulp thrown 0Ewithout injuring the texture of the mass or breaking the fibers. Thismachine is simple to build, it is easily operated, and large masses ofpulp may be formed into thick sheets by the expenditure of very littlepower. It is easy to place the heavy molds containing the pulp in thismachine and to remove them after the moisture has been expressed. Ifdesired, a cover may be placed over this machine to prevent the waterfrom flying.

I claim as my invention 1. A machine for forming leather-board frompulp, consisting of a horizontal shaft, a frame supported by the shaft,perforated heads fixed to the periphery of the frame, perforated bedsmovably supported by the frame inside of the heads, and molds withforaminated bottoms and covers placed between the beds and theheads,substantially as specified.

2. A machine for forming leather-board from pulp, consisting of ahorizontal shaft, a frame supported by the shaft, perforated heads fixedto the periphery of the frame, perforated beds movably supported by theframe inside of the heads, means for moving the beds outwardly towardthe heads, and molds with foraminated bottoms and covers placed betweenthe beds and the heads,'snbstantially as specified.

3. A machine for forming leatherboard from pulp, consisting of ahorizontal shaft, a frame supported by the shaft, POI'ffjtttGd headsfixed to the periphery of the frame, perforated beds movably supportedby the frame inside of the heads, worms and worm-wheels for moving thebeds outwardly, and molds with for'aminated bottoms and covers placedbetween the beds and heads, substantially as specified.

4:. A machine for forming leather board from pulp, consisting of ahorizontal shaft, a frame supported by the shaft, perforated heads fixedto the periphery of the frame, perforated beds movably supported by theframe inside of the heads, worms, worm-wheels, nuts and springs formoving the beds outwardly, and molds with foraminated bottoms and coversplaced between the beds and heads, substantially as specified.

5. A machine for forming leather-board from pulp, consisting of ahorizontal shaft, 21

frame supported by the shaft, heads having tapering perforations fixedto the periphery of the frame, beds movably supported by the frameinside of the heads, and molds with foraminated bottoms and coversplaced between the beds and the heads, substantially as specified.

6. A machine for forming leatherboard from pulp, consisting of ahorizontal shaft, a frame supported by the shaft, perforated heads fixedto the periphery of the frame, beds having tapering perforations movablysupported by the frame inside of the heads, and molds with foraminatedbottoms and covers placed between the beds and the heads, substantiallyas specified.

7. A machine for forming leather-board from pulp, consisting of ahorizontal shaft, 21. frame supported by the shaft, perforated headsfixed to the periphery of the frame, perforated beds movably supportedby the frame inside of the heads, sleeves connected with the backs ofthe beds, springs tending to thrust the sleeves outwardly, means forcompressing the springs, and molds with foraminated bottoms and coversplaced between the beds and the heads, substantially as specified.

8. In a machine of the class described, a rotary basket having a socketat its periphery and arranged to turn about a horizontal axis wherebysaid socket may be placed in a horizontal plane, a perforated face-blockmounted on the outer face of the socket, a follower arranged inopposition to the face-block, and means for exerting a fixed pressureupon the follower in the direction of the face-block.

9. In a machine of the class described, a rotary basket having socketsat its periphery, a horizontal axis or shaft supporting the hasket, aperforated face-block in each socket, a mold or box fitting theface-block, a perforated follower supported in opposition to the Iface-block in each socket and free to move toward it, and means forexerting a fixed pres sure upon the follower in the direction of theface-block.

10. In a machine of the class described, a

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rotary frame, a horizontal shaft supporting pressure upon its contentswhen in place ina the frame, supports on the frame forming a socket inthe frame.

socket whereby a mold may be held normal to the radius of the frame, amold with per- 1 EDWIN ALVORD'W 5 forated faces and fitting said socketin the Witnesses:

frame, afollower back of the mold-socket, and H. R. WILLIAMS,

means for clamping the mold and exerting V. R. HOLCOMB.

